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Western Lake Ontario

Warnings

Forecast

Marine Forecast

Issued 03:00 AM EDT 20 April 2026

Today Tonight and Tuesday.

Wind northwest 15 knots diminishing to northwest 10 this morning then backing to west 10 this afternoon. Wind becoming light this evening then becoming south 10 Tuesday morning. Wind increasing to east 15 Tuesday afternoon.

Scattered flurries or scattered showers ending early this morning.

Waves

Issued 03:00 AM EDT 20 April 2026
Today Tonight and Tuesday. Waves 0.5 to 1 metre subsiding to 0.5 or less near noon then building to 0.5 to 1 Tuesday evening.

Extended Forecast

Issued 03:00 AM EDT 20 April 2026
Wednesday Wind east 15 knots diminishing to light in the afternoon.
Thursday Wind light.
Friday Wind light becoming east 15 knots late in the day.

Ice Forecast*

Issued 12:00 PM EDT 19 April 2026 Today Tonight and Monday Ice free.

*Ice Forecast and Warnings also apply to U.S. waters

 

[ Canadian Ice Service ]

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Map of Great Lakes - Lake Huron marine weather areas Wiarton Airport Western Islands Cove Island Goderich Lake Simcoe Regional Airport Vineland Station Parry Sound Harbour Sarnia Chris Hadfield Airport Tobermory Muskoka Airport Harrow AAFC Long Point Port Weller St. Catharines / Niagara District Airport Lagoon City Southeast Shoal Burlington Lift Bridge Welland-Pelham Windsor Airport Port Colborne Erieau Peterborough Municipal Airport CFB Trenton Toronto City Centre Airport Point Petre Oshawa Executive Airport Hamilton Munro Int'l Airport Point Pelee Cobourg Port Colborne - 45142 North Channel - 45154 Ajax - 45159 Lake Nipissing - 45152 Sault Ste. Marie Airport Killarney Lake Simcoe - 45151 Greater Sudbury Airport South Lake Huron - 45149 Lake St Clair - 45147 North Bay Airport South Georgian Bay - 45143 Gore Bay-Manitoulin Airport Grimsby - 45139 Georgian Bay - 45137 Great Duck Island Collingwood Kingston Airport Grenadier Island Brockville Prince Edward Point - 45135 Port Stanley - 45132
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Ice Conditions

*Ice Forecast and Warnings also apply to U.S. waters

Ice Forecasts

Issued 12:00 PM EDT 19 April 2026 Today Tonight and Monday

Ice Coverage

Ice free.

Warnings

No watches or warnings in effect.

Synopsis

Technical Marine Synopsis

Issued 3:00 AM EDT 20 April 2026 Today Tonight and Tuesday At 3:00 a.m. EDT today high 1028 mb located over Wisconsin.
By 3:00 a.m. EDT Tuesday high 1030 mb located southeast of Lake
Ontario.

At 3:00 a.m. EDT today low 989 mb located over northern
Saskatchewan.
By 3:00 a.m. EDT Tuesday low 996 mb located over Hudson Bay.

Great Lakes - Lake Huron Area

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Marine Weather for Canada

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